/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the Microsoft Live Share SDK License.
 */
import { IRuntimeSignaler, TimeInterval, LiveShareRuntime } from "@microsoft/live-share";
import { GroupTransportState } from "./GroupTransportState";
import { CoordinationWaitPoint, ExtendedMediaSessionPlaybackState } from "../MediaSessionExtensions";
import { GroupPlaybackRate } from "./GroupPlaybackRate";
/**
 * Per client position
 * @hidden
 */
export interface ICurrentPlaybackPosition {
    playbackState: ExtendedMediaSessionPlaybackState;
    waitPoint?: CoordinationWaitPoint;
    position: number;
    duration?: number;
    timestamp: number;
    clientId: string;
}
/**
 * @hidden
 */
export declare class GroupPlaybackPosition {
    private _transportState;
    private _playbackRate;
    private _runtime;
    private _liveRuntime;
    private _updateInterval;
    private _positions;
    constructor(transportState: GroupTransportState, playbackRate: GroupPlaybackRate, runtime: IRuntimeSignaler, liveRuntime: LiveShareRuntime, updateInterval: TimeInterval);
    /**
     * Returns the latest position info for the local client.
     */
    get localPosition(): ICurrentPlaybackPosition | undefined;
    /**
     * Returns the total number of clients actively being tracked.
     */
    get totalClients(): number;
    /**
     * Returns true if all clients being tracked are reporting that they have
     * either ended or haven't started.
     */
    get trackEnded(): boolean;
    /**
     * Returns the number of clients we're waiting for before we can stop waiting.
     */
    get clientsWaiting(): number;
    /**
     * Returns the max playback position relative to the start position.
     *
     * @remarks
     * This is called when calculating the current seekTo position.
     */
    get maxPosition(): number;
    /**
     * Optional media duration if known.
     */
    mediaDuration?: number;
    get targetPosition(): number;
    /**
     * Enumerates every reported playback position.
     * @param callbackFn Function applied to each position,
     */
    forEach(callbackFn: (position: ICurrentPlaybackPosition, projectedPosition: number) => void): void;
    UpdatePlaybackPosition(position: ICurrentPlaybackPosition): void;
    private getMostProgressedPosition;
    private limitProjectedPosition;
}
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